The 3030 provides 4 independent digital-to-analogue converters, each producing a voltage output. A converter (output channel) consists of a group of 8 connections on the 37-way D type connector.

The connections configure the channels as either bipolar or unipolar with maximum ranges of ±10.24V and 0 to 10.24V respectively. Smaller ranges can be achieved by dividing down the Reference Out connection with 2 resistors. If the Reference In connection is an AC signal, the channel functions as a programmable attenuator. This signal could be up to 10 kHz in frequency. Alternatively the output of one 3030 channel can be fed to the reference input of another channel giving a D-A converter with a finely controlled full-scale range.

At power-up the output is always 0V; or in the case of bipolar outputs can be set to either 0V or the full scale negative output. Each output can supply 20mA of current and is short circuit protected.

The 3031 provides 4 independent D-A converters of 12-bit resolution. It produces 4-20mA current outputs, suitable for use in industrial environments. Each output is capable of driving up to 750 Ohms. The source of the power supply for the 4-20mA signals can be from the Microlink, or from an external power supply (15-30V).

This module is intended for the generation of accurate voltage outputs with a number of fixed full scale ranges. It provides a single channel of 12-bit D-A conversion. A wide variety of output ranges are available through software. The output is short circuit protected and delivers 20mA of current.

The 3033 is similar to the 3032 but has 16-bit resolution and so is even more accurate. A wide variety of output ranges are available through software. The output can provide up to 20mA of current, but you should note that if you draw significant currents, lead resistance becomes an important error source. For example, on the 0 to 10 V range with 20 mA of output current, every 15mOhm of lead resistance will cause 1 LSB of error at the load. The output is short circuit protected.